What was the SIZE of the Brown Duck-like bird you saw in New Hampshire?

Greater White-fronted Goose: This medium-sized goose has a dark-brown body and the underparts are barred and flecked with black. The belly and under tail coverts are white. The front of the face has a white patch and the bill is usually pink-orange. The legs are orange. It feeds on seeds, grain, grasses and berries. It has a steady direct flight with rapid wing beats. The sexes are similar.